Old carburated low compression farm tractors have an inheirintly lower thermal efficiency over most diesels at full power HD service.
Putting around ight duty the service the lightly loaded gas can burn less fuel than a lightly loaded diesel.
Comparing fuels should be done as cost per btu rather than cost per gallon.
Given the success of direct injection gasoline engines in light duty service. They are serious competition to a Tier IV diesel in initial cost , fuel per btu with diesel costing so much more than gasoline . After warrenty repairs of Tier IV emissions is going to hurt some pocket books someday.
Of course some want diesel , because it a diesel no matter what. Even if a DI gas was offered in small light duty equipment . Then again some boats, snowmobiles, ATV 's , RTV and lawn equipment are already DI gas .
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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